Siemens 3UG4 User Manual page 356

Accessories
13.3 Accessories for 3UG458. insulation monitoring relays.
Wiring examples for the 3UG4583 insulation monitoring relay with connected 3UG4983 upstream
module
Measuring inputs L+ and L- can be connected to any conductor. Measuring inputs L+ and L-
must always be connected to different conductors.
The rated system voltage is U
2-wire AC system / 2-wire DC system
2-wire AC system
3-wire AC system / 3-wire DC system
3-wire AC system
4-wire AC system
4-wire AC system
356
≤ 690 V AC (15 to 400 Hz) or U
n
2-wire DC system
3-wire DC system
≤ 1000 V DC.
n
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004